Means for regulating the temperature of air fed to carbureters.



D. BARNARD.

MEANS FOR REGULATING THE TEMPERATURE OF AIR FED T0 GARBURETERS.

APPLICATION FILED NOV.8, 1910.

1,032,5@2- Patented Ju1y16,1912.

nrrn f STATES @nur oFFIoE.

Davis-Barmenia, onLostANenLEs, GALIEQRNIA Specication of Letters Intent.,

Application led November 8, 1910. Serial No. 591,307.

Batentedalulyl, 1,912:

To all whom it mqyconcern:

Be it known that I, lDAVIS BARNABD, a

citizen of the United States, residing at Los- Angeles, California, have invented a new.

and useful Means for Regulating the Temperature of Air- Fedy to Carbureters, of' which the following .is a specification.

This invention relates to improved means for supplyingcarbureters with air heated to a predetermined degree such as is necessary to properly vaporize fuels of different degrees of specific gravity.

The invention provides for automatically regulating the degree ofl heat of the air l5 which isfed to the carbureter, such air be-l ing drawn partially from a body heatedvby the engine, such fonexample, asthe cylinder, or other heated'portion of the engine, and partially from the outer atmosphere, the appliance automatically governing the proportions or volumes of air fed from these two sources so thaty the resulting blended current of air supplied to the` carburetor is automatically maintained at any desired degree.

The above features of the inventiony are' supplementedby means for positively predetermining the Vdegree of heat at@ which the tube t'o automatically control the lengthwisey extent, of said; openings. The means last 4 mentioned may be operated by any desir- 5 able known thermostatic construct-mma convenient device forv the, purpOSebeing illusx trated in the drawings'. p f,

Referringto the accompanying drawings, which illustrate the invention, vFigure 1 is a mid-section of the appliance;` Fig. 2 is; an -enlarged sectional detailof-a portionof Fig. 1; Fig. 3 is a transverse section on line w3 L ofFig.- 1, parts being broken away; Fig. 1

5 is a. detail. side. elevationf withparts brokenaWay; Fig. 5 is a side elevation on are- 4'duced scale showing the appliance connected up` to an engine and carburetor; Fig.A 6-.is aF @perspective view of the regulating'shutter. showing also part of the inlet tube therebeneath. l

Referring in detail to the drawings, with-l Iin'a chamber which is desirablyforlned by at drum-shaped casing 1, is mounted a thermostatic ldevice consisting of a series of flat transverse containers 2 desirably made up 65 each of two dish-shaped disks fastened to' each other with their concave. sidesfaeing and riveted together along their peripheries. Said vcontainers 2 must be made of thin reisilient material and mustbe hermetically sealed so that the contraction 'and expansion of the air in them will cause the thermostat to operate properly. The uppermost of 'tlfe containers 2 is suspended from thecenterof' :the drum-head 1 by `means of a-rod 5 the 75 Y position of which isregulated by the milled head 6 and a locking nut 7; Each of-the lintermediate containers 2 is connected together at proper distances from each other by means of vseparate rods Shaving reduced .80

end portions 9 which project through the ad; jacent walls, of the. containers and arerivete'd down to. connect the containers and make an air tight tti-ng.. I

From the lower sideof the lowermost 8 5 container extends an operating rod 11 connected to a valve header damper 12. Said valve head 12 hasa skirt 13 which fits lwithin' the inlet tube 145.1 Through said inlet tube 14 leadsa series of inlet openings- 16' 90 whichlare more or less closed by means ofa .shutter 17 fitting over saidtube and having cut-away portions orj openings 18 which may be brought wholly ory partially into register with said inlet openings 16., The tube 14 for admittingcoldair'tov the device is c ontraotd at 14,\to formavalveseatfor the valve .head 12. When the air; within casing 1 becomes overheated, theair within. 1

the containers2becomes hot and expands, 09

forcing farther apart the disks whichfforin saidcontainers. and thereby loweringrodll so thatskirt lcomes belowthe air inlets 1 6.A In order t0.. accurately Qontrelithie positioniof said shutten and guard against displacement t hereof, aretaining spring 19 isproy vided themen, said spring having an arm 2 0 vthe end of which engages a series of notches 21- formed-.on the outside ofthe^.inletgtube,11., Inorder to keep said shutter 17 from sliding coA lfrom near the closed upper end of said jacket. From the other side of drum 1 leads the pipe 31 which communicates with the carbureter 32. The shutter 17 is circumferentially adjusted to allow a greater orless intake of cold air according to whether a more or less volatile liquid fuel is used. The upper container of the thermostat may be swiveled to the rod 5 by means of a clip 33 which surrounds a flange 34 on the lowerv end of the rod.`

When the engine is started the thermostat will be in the position shown in Fig. 1 holding the damper up and thusclosing all the air inlets. By a proper rotation of rod 5 by its milled head 6, said rod being threaded through the top wall of t-he casing, the normal position of the containers of the thermostat may be so regulated that the variations of heat within the thermostat will cause the damper 12 to move up and down in the manner necessar to secure a vproper automatic regulation o the temperature of the air supplied to the carbureter. I claim:

l. In a thermostatic air regulator, a hotl air supply, a casing provided with a `chamber for blending hot and cold air, a hot air tube to conduct hot air from said supply into said chamber, a cold air supply passage opening into said hot air tube near the mouth thereof, a cold air inlet tube or cylinder with which said passage communi- Cates, said inlet tube having lateral inlet openings, a damper to vary the size of said openings from within said tube, a thermostat within the blending chamber, and an 'operating rod working through the wall of said chamber and operatively connecting said thermostat and damper.

2. In a thermostatic air regulator, a hot alr supply, a casing provided with a chamber into which air is conducted from said supply, a tube to conduct cold air into said chamber to blend the cold air with the heated air therein, said tube having lateral inlet openings, an external shutter to con-` trol jthe size of said openings-'ls pre-determine a damper to vary the size of said ope ngs from within said tube, a thermosta to operate said damper, and means to conduct air from said chamber to a place of use.

3. In a thermostatic air regulator, -a casing, means to conduct cold air to said casing, means to conduct heated air to said casing, one o f said means being provided with an inlet, the opening of said inletbe'ing regulated from one side by a manually operable shutter, and from the other side by a thermostatically operative damper, and a thermostat to control said damper.

4. In a thermostatic air regulator, in combination, a blending chamber, means to conduct heated air therefrom to a place of use, an inlet tube to conduct cold air to said blending chamber, said tube having lateral openings, a longitudinally movable damper, a thermostat to move said damper in opposite directions to control the size of said openings from the inside of said tube, and a circumferentially adjustable shutter to control the size of said openings from the outside of said tube. l

5. In a thermostatic air regulator, in 'combination, means to conduct heatedy air to a place of use, means for blending cold air with said heated air during its movement toward the place of use, said blending means comprising an inlet tube to conduct cold air thereto, said tube having lateral openings, said tube being contracted to form a valve seat'on the delivery side of'said openings, a damper within said tube to regulate the size of said openings, said damper comprising a valve to t said valve seat, a skirt depending from said valve to close said opening, and means to thermostatically operate said damper.

6. In a thermostatic air regulator, the combination, with a blending chamber and thermostat therein, of an inlet tube to sup-v ply cold air for said chamber, said tube having lateral openings, a damper within said tube, said damper being controlled by j said thermostat to regulate the size of said openings from the inside said tube, a circumferentially adjustablel shutter to regulate the size of said openings from the outside of said tube, and a spring arm carried by said shutter, the free end of said arm engaging said tube to hold said shutter yieldingly in the adjusted position.

In testimony whereof I have `hereunto,

signed my name in the presence 'of two subscribing witnesses at Los Angeles, in the county of Los Angeles and State of California, this third day of November 1910.

DAVIS BARNARD.

Witnesses:

JOHN M. YORK, ALBERT H. MERRILL. 

